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Groups > linux.kernel > #1695790
| From | Borislav Petkov <bp@suse.de> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [RFC Part1 PATCH v3 02/17] x86/CPU/AMD: Add the Secure Encrypted Virtualization CPU feature |
| Date | 2017-07-25 16:40 +0200 |
| Message-ID | <u79aa-3YE-17@gated-at.bofh.it> (permalink) |
| References | <u70Tg-7fI-21@gated-at.bofh.it> <u75gd-1yO-3@gated-at.bofh.it> <u75gd-1yO-1@gated-at.bofh.it> <u79aa-3YE-19@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Tue, Jul 25, 2017 at 09:29:40AM -0500, Tom Lendacky wrote:
> Yup, we can do something like that. I believe the only change that
> would be needed to your patch would be to move the IS_ENABLED() check
> to after the physical address space reduction check.
Yeah, I wasn't sure about that. The logic is that if BIOS has enabled
SME and thus reduction is in place, we need to update x86_phys_bits on
32-bit regardless, right?
But, come to think of it, that reduction won't have any effect since we
have 32-bit addresses and the reduction is above 32-bits, right? And
thus it is moot.
Or?
--
Regards/Gruss,
Boris.
SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg)
--
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Re: [RFC Part1 PATCH v3 02/17] x86/CPU/AMD: Add the Secure Encrypted Virtualization CPU feature Borislav Petkov <bp@suse.de> - 2017-07-25 12:30 +0200
Re: [RFC Part1 PATCH v3 02/17] x86/CPU/AMD: Add the Secure Encrypted Virtualization CPU feature Borislav Petkov <bp@suse.de> - 2017-07-25 16:40 +0200
Re: [RFC Part1 PATCH v3 02/17] x86/CPU/AMD: Add the Secure Encrypted Virtualization CPU feature Borislav Petkov <bp@suse.de> - 2017-07-25 17:20 +0200
Re: [RFC Part1 PATCH v3 02/17] x86/CPU/AMD: Add the Secure Encrypted Virtualization CPU feature Borislav Petkov <bp@suse.de> - 2017-07-25 17:40 +0200
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